Self-illuminating Display Luminance Compensation via Voltage Matrix Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Self-illuminating displays, such as OLED and micro LED displays, experience luminance errors and image sticking due to incorrect current flow through LEDs caused by temperature changes and material characteristics over long-term operation.
Innovation Solution
A self-illuminating display apparatus and compensation method that includes a pixel array, display driving circuit, and compensation estimation circuit, which converts gray-level data into an original data voltage matrix, accumulates data over time to determine luminance attenuation, and generates a compensation voltage matrix to produce a compensated data voltage matrix, ensuring accurate luminance by adjusting driving voltages based on material characteristics and operation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If self-illuminating display operates for long-term, then display continuity is maintained, but luminance accuracy deteriorates due to material characteristics and temperature changes
Solution Approach 1:
The system performs preliminary measurement of cumulative gray-level data to predict future luminance attenuation. By calculating the cumulative gray-level matrix in advance and using it to generate compensation voltages before luminance errors occur, the system proactively maintains luminance accuracy throughout long-term operation
Solution Approach 2:
The system establishes a feedback loop where cumulative gray-level data from displayed images is continuously accumulated and used to adjust compensation voltages. This feedback mechanism allows the system to adapt to gradual material degradation and temperature changes, maintaining luminance accuracy over extended operation periods
2Measurement precision
If compensation voltage is applied to correct luminance attenuation, then luminance accuracy is improved, but device complexity increases due to additional compensation estimation circuit
Solution Approach 1:
The compensation estimation circuit performs multiple functions: it accumulates gray-level data, calculates luminance attenuation, generates compensation voltages, and adjusts driving signals. By consolidating these functions into a single integrated circuit, the system improves luminance accuracy without proportionally increasing overall device complexity
Solution Approach 2:
The system changes the voltage parameter dynamically by adding compensation voltages to the original driving voltages. This parameter adjustment approach allows luminance correction without requiring fundamental changes to the display structure or adding complex hardware components
3Measurement precision
If cumulative gray-level data is accumulated to determine luminance attenuation, then compensation precision is improved, but data processing time increases
Solution Approach 1:
The system accumulates cumulative gray-level data in advance during normal display operation and uses this pre-accumulated data to generate compensation voltages. By performing the accumulation process continuously in the background, the system prepares compensation information without adding noticeable delay to the display refresh cycle
Data Source
AI summary
A self-illuminating display apparatus and a display frame compensation method thereof are provided. The self-illuminating display apparatus includes pixel units, a display driving circuit, and a compensation estimation circuit. The compensation estimation circuit converts a gray-level data matrix into an original data voltage matrix, and accumulates the received gray-level data matrix over time to obtain a cumulative gray-level matrix. The compensation estimation circuit determines a degree of luminance attenuation of the pixel units based on the cumulative gray-level matrix. The compensation estimation circuit generates a compensation voltage matrix according to the gray-level data matrix and the degree of luminance attenuation of the pixel units. The compensation estimation circuit generates a compensated data voltage matrix according to the original data voltage matrix and the compensation voltage matrix. The pixel units are driven by the display driving circuit according to the compensated data voltage matrix.